EIP-712 for Off-Chain Signing

Not every governed action needs to be an on-chain transaction. Many governance and coordination flows use EIP-712 typed data so that a signer can approve a structured message off-chain.

Blockdaemon supports EIP-712 typed message signing through its MPC and governance layers for workflows such as:

• off-chain governance proposals
• Snapshot voting
• Gnosis Safe approvals
• intent-based bridge deposits

How it works

A standard EIP-712 flow includes:

1. Define the domain
2. Define the typed message schema
3. Build the message payload
4. Present the payload for approval
5. Sign it using the governed wallet
6. Submit the signature to the consuming application or relayer

This keeps the signed intent structured, human-reviewable, and verifiable.

Example typed data payload

{
  "domain": {
    "name": "Blockdaemon Governance",
    "version": "1",
    "chainId": 1,
    "verifyingContract": "0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC"
  },
  "types": {
    "Vote": [
      { "name": "proposalId", "type": "uint256" },
      { "name": "support", "type": "uint8" },
      { "name": "voter", "type": "address" }
    ]
  },
  "primaryType": "Vote",
  "message": {
    "proposalId": "42",
    "support": 1,
    "voter": "0x1111111111111111111111111111111111111111"
  }
}

Example use cases

Governance voting

const typedVote = {
  proposalId: "42",
  support: 1,
  voter: signerAddress
};

Safe or workflow approval

const typedApproval = {
  action: "approve_distribution",
  batchId: "dist_2026_03",
  nonce: 7
};

Why it matters

EIP-712 provides a standard way to sign structured payloads instead of opaque blobs. That improves:

• readability
• verification
• interoperability
• governance control

It is especially useful when the action is approved off-chain but executed elsewhere by a relayer, Safe module, bridge, or governance service.

When to use it

Use EIP-712 signing when you need to:

• approve off-chain governance actions
• support Snapshot-style voting
• authorize Safe-related actions
• sign bridge or relay intents
• preserve governance controls without requiring direct on-chain execution for every step

Notes

Some cross-chain and governance patterns reduce to either an EVM transaction or an EIP-712 message. In those cases, the control plane can act as the signing and custody layer.